Mercurial Repositories > eric / file comparison
comparison: eric7/EricWidgets/EricModelToolBar.py
eric7/EricWidgets/EricModelToolBar.py
- branch
- eric7
- changeset 8358
- 144a6b854f70
- parent 8356
- 68ec9c3d4de5
- child 8366
- 2a9f5153c438
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| 8357:a081458cc57b | 8358:144a6b854f70 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 - 2021 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a tool bar populated from a QAbstractItemModel. | |
| 8 """ | |
| 9 | |
| 10 from PyQt6.QtCore import pyqtSignal, Qt, QModelIndex, QPoint, QEvent | |
| 11 from PyQt6.QtGui import QDrag, QIcon | |
| 12 from PyQt6.QtWidgets import QApplication, QToolBar, QToolButton | |
| 13 | |
| 14 | |
| 15 class EricModelToolBar(QToolBar): | |
| 16 """ | |
| 17 Class implementing a tool bar populated from a QAbstractItemModel. | |
| 18 | |
| 19 @signal activated(QModelIndex) emitted when an action has been triggered | |
| 20 """ | |
| 21 activated = pyqtSignal(QModelIndex) | |
| 22 | |
| 23 def __init__(self, title=None, parent=None): | |
| 24 """ | |
| 25 Constructor | |
| 26 | |
| 27 @param title title for the tool bar (string) | |
| 28 @param parent reference to the parent widget (QWidget) | |
| 29 """ | |
| 30 if title is not None: | |
| 31 super().__init__(title, parent) | |
| 32 else: | |
| 33 super().__init__(parent) | |
| 34 | |
| 35 self.__model = None | |
| 36 | |
| 37 self.__root = QModelIndex() | |
| 38 self.__dragStartPosition = QPoint() | |
| 39 | |
| 40 if self.isVisible(): | |
| 41 self._build() | |
| 42 | |
| 43 self.setAcceptDrops(True) | |
| 44 | |
| 45 self._mouseButton = Qt.MouseButton.NoButton | |
| 46 self._keyboardModifiers = Qt.KeyboardModifier.NoModifier | |
| 47 self.__dropRow = -1 | |
| 48 self.__dropIndex = None | |
| 49 | |
| 50 def setModel(self, model): | |
| 51 """ | |
| 52 Public method to set the model for the tool bar. | |
| 53 | |
| 54 @param model reference to the model (QAbstractItemModel) | |
| 55 """ | |
| 56 if self.__model is not None: | |
| 57 self.__model.modelReset.disconnect(self._build) | |
| 58 self.__model.rowsInserted[QModelIndex, int, int].disconnect( | |
| 59 self._build) | |
| 60 self.__model.rowsRemoved[QModelIndex, int, int].disconnect( | |
| 61 self._build) | |
| 62 self.__model.dataChanged.disconnect( | |
| 63 self._build) | |
| 64 | |
| 65 self.__model = model | |
| 66 | |
| 67 if self.__model is not None: | |
| 68 self.__model.modelReset.connect(self._build) | |
| 69 self.__model.rowsInserted[QModelIndex, int, int].connect( | |
| 70 self._build) | |
| 71 self.__model.rowsRemoved[QModelIndex, int, int].connect( | |
| 72 self._build) | |
| 73 self.__model.dataChanged.connect( | |
| 74 self._build) | |
| 75 | |
| 76 def model(self): | |
| 77 """ | |
| 78 Public method to get a reference to the model. | |
| 79 | |
| 80 @return reference to the model (QAbstractItemModel) | |
| 81 """ | |
| 82 return self.__model | |
| 83 | |
| 84 def setRootIndex(self, idx): | |
| 85 """ | |
| 86 Public method to set the root index. | |
| 87 | |
| 88 @param idx index to be set as the root index (QModelIndex) | |
| 89 """ | |
| 90 self.__root = idx | |
| 91 | |
| 92 def rootIndex(self): | |
| 93 """ | |
| 94 Public method to get the root index. | |
| 95 | |
| 96 @return root index (QModelIndex) | |
| 97 """ | |
| 98 return self.__root | |
| 99 | |
| 100 def _build(self): | |
| 101 """ | |
| 102 Protected slot to build the tool bar. | |
| 103 """ | |
| 104 if self.__model is None: | |
| 105 return | |
| 106 | |
| 107 self.clear() | |
| 108 | |
| 109 for i in range(self.__model.rowCount(self.__root)): | |
| 110 idx = self.__model.index(i, 0, self.__root) | |
| 111 | |
| 112 title = idx.data(Qt.ItemDataRole.DisplayRole) | |
| 113 icon = idx.data(Qt.ItemDataRole.DecorationRole) | |
| 114 if icon == NotImplemented or icon is None: | |
| 115 icon = QIcon() | |
| 116 folder = self.__model.hasChildren(idx) | |
| 117 | |
| 118 act = self.addAction(icon, title) | |
| 119 act.setData(idx) | |
| 120 | |
| 121 button = self.widgetForAction(act) | |
| 122 button.installEventFilter(self) | |
| 123 | |
| 124 if folder: | |
| 125 menu = self._createMenu() | |
| 126 menu.setModel(self.__model) | |
| 127 menu.setRootIndex(idx) | |
| 128 button.setMenu(menu) | |
| 129 button.setPopupMode( | |
| 130 QToolButton.ToolButtonPopupMode.InstantPopup) | |
| 131 button.setToolButtonStyle( | |
| 132 Qt.ToolButtonStyle.ToolButtonTextBesideIcon) | |
| 133 | |
| 134 def index(self, action): | |
| 135 """ | |
| 136 Public method to get the index of an action. | |
| 137 | |
| 138 @param action reference to the action to get the index for (QAction) | |
| 139 @return index of the action (QModelIndex) | |
| 140 """ | |
| 141 if action is None: | |
| 142 return QModelIndex() | |
| 143 | |
| 144 idx = action.data() | |
| 145 if idx is None: | |
| 146 return QModelIndex() | |
| 147 | |
| 148 if not isinstance(idx, QModelIndex): | |
| 149 return QModelIndex() | |
| 150 | |
| 151 return idx | |
| 152 | |
| 153 def _createMenu(self): | |
| 154 """ | |
| 155 Protected method to create the menu for a tool bar action. | |
| 156 | |
| 157 @return menu for a tool bar action (EricModelMenu) | |
| 158 """ | |
| 159 from .EricModelMenu import EricModelMenu | |
| 160 return EricModelMenu(self) | |
| 161 | |
| 162 def eventFilter(self, obj, evt): | |
| 163 """ | |
| 164 Public method to handle event for other objects. | |
| 165 | |
| 166 @param obj reference to the object (QObject) | |
| 167 @param evt reference to the event (QEvent) | |
| 168 @return flag indicating that the event should be filtered out (boolean) | |
| 169 """ | |
| 170 if evt.type() == QEvent.Type.MouseButtonRelease: | |
| 171 self._mouseButton = evt.button() | |
| 172 self._keyboardModifiers = evt.modifiers() | |
| 173 act = obj.defaultAction() | |
| 174 idx = self.index(act) | |
| 175 if idx.isValid(): | |
| 176 self.activated[QModelIndex].emit(idx) | |
| 177 elif ( | |
| 178 evt.type() == QEvent.Type.MouseButtonPress and | |
| 179 evt.buttons() & Qt.MouseButton.LeftButton | |
| 180 ): | |
| 181 self.__dragStartPosition = self.mapFromGlobal(evt.globalPosition().toPoint()) | |
| 182 | |
| 183 return False | |
| 184 | |
| 185 def dragEnterEvent(self, evt): | |
| 186 """ | |
| 187 Protected method to handle drag enter events. | |
| 188 | |
| 189 @param evt reference to the event (QDragEnterEvent) | |
| 190 """ | |
| 191 if self.__model is not None: | |
| 192 mimeTypes = self.__model.mimeTypes() | |
| 193 for mimeType in mimeTypes: | |
| 194 if evt.mimeData().hasFormat(mimeType): | |
| 195 evt.acceptProposedAction() | |
| 196 | |
| 197 super().dragEnterEvent(evt) | |
| 198 | |
| 199 def dropEvent(self, evt): | |
| 200 """ | |
| 201 Protected method to handle drop events. | |
| 202 | |
| 203 @param evt reference to the event (QDropEvent) | |
| 204 @exception RuntimeError raised to indicate an invalid model index | |
| 205 """ | |
| 206 if self.__model is not None: | |
| 207 act = self.actionAt(evt.position().toPoint()) | |
| 208 parentIndex = self.__root | |
| 209 if act is None: | |
| 210 row = self.__model.rowCount(self.__root) | |
| 211 else: | |
| 212 idx = self.index(act) | |
| 213 if not idx.isValid(): | |
| 214 raise RuntimeError("invalid index") | |
| 215 row = idx.row() | |
| 216 if self.__model.hasChildren(idx): | |
| 217 parentIndex = idx | |
| 218 row = self.__model.rowCount(idx) | |
| 219 | |
| 220 self.__dropRow = row | |
| 221 self.__dropIndex = parentIndex | |
| 222 evt.acceptProposedAction() | |
| 223 self.__model.dropMimeData(evt.mimeData(), evt.dropAction(), | |
| 224 row, 0, parentIndex) | |
| 225 | |
| 226 super().dropEvent(evt) | |
| 227 | |
| 228 def mouseMoveEvent(self, evt): | |
| 229 """ | |
| 230 Protected method to handle mouse move events. | |
| 231 | |
| 232 @param evt reference to the event (QMouseEvent) | |
| 233 @exception RuntimeError raised to indicate an invalid model index | |
| 234 """ | |
| 235 if self.__model is None: | |
| 236 super().mouseMoveEvent(evt) | |
| 237 return | |
| 238 | |
| 239 if not (evt.buttons() & Qt.MouseButton.LeftButton): | |
| 240 super().mouseMoveEvent(evt) | |
| 241 return | |
| 242 | |
| 243 manhattanLength = (evt.position().toPoint() - | |
| 244 self.__dragStartPosition).manhattanLength() | |
| 245 if manhattanLength <= QApplication.startDragDistance(): | |
| 246 super().mouseMoveEvent(evt) | |
| 247 return | |
| 248 | |
| 249 act = self.actionAt(self.__dragStartPosition) | |
| 250 if act is None: | |
| 251 super().mouseMoveEvent(evt) | |
| 252 return | |
| 253 | |
| 254 idx = self.index(act) | |
| 255 if not idx.isValid(): | |
| 256 raise RuntimeError("invalid index") | |
| 257 | |
| 258 drag = QDrag(self) | |
| 259 drag.setMimeData(self.__model.mimeData([idx])) | |
| 260 actionRect = self.actionGeometry(act) | |
| 261 drag.setPixmap(self.grab(actionRect)) | |
| 262 | |
| 263 if drag.exec() == Qt.DropAction.MoveAction: | |
| 264 row = idx.row() | |
| 265 if self.__dropIndex == idx.parent() and self.__dropRow <= row: | |
| 266 row += 1 | |
| 267 self.__model.removeRow(row, self.__root) | |
| 268 | |
| 269 def hideEvent(self, evt): | |
| 270 """ | |
| 271 Protected method to handle hide events. | |
| 272 | |
| 273 @param evt reference to the hide event (QHideEvent) | |
| 274 """ | |
| 275 self.clear() | |
| 276 super().hideEvent(evt) | |
| 277 | |
| 278 def showEvent(self, evt): | |
| 279 """ | |
| 280 Protected method to handle show events. | |
| 281 | |
| 282 @param evt reference to the hide event (QHideEvent) | |
| 283 """ | |
| 284 if len(self.actions()) == 0: | |
| 285 self._build() | |
| 286 super().showEvent(evt) | |
| 287 | |
| 288 def resetFlags(self): | |
| 289 """ | |
| 290 Public method to reset the saved internal state. | |
| 291 """ | |
| 292 self._mouseButton = Qt.MouseButton.NoButton | |
| 293 self._keyboardModifiers = Qt.KeyboardModifier.NoModifier |
